Articuno @ Light Clay  
Ability: Snow Warning  
EVs: 248 HP / 8 Def / 252 Spe  
Timid Nature  
- Freeze-Dry  
- U-turn  
- Aurora Veil  
- Roost

Articuno is stupidly bulky thanks to Hail's Defense buff, further bolstered by Aurora Veil. Articuno is able to U-Turn out into a setup sweeper with ease, and with proper support, can come back in to set up Aurora Veil once again.
Other Options: Blizzard, Whirlwind